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~~ ~~]~~] 61 I Skyline Road - Laramie, WY 82070 - (307) 742-0031 <br />~WWC ENGINEERING FAX (307) )21.2913 - E-mail: in(olar@wwcenginee ring.com <br />October 5, 2005 <br />Mr. Byron Walker <br />Colorado Division of Minerals and Geology <br />1313 Sherman St., Room 215 <br />Denver. CO 80203-2273 <br />RE: Edna Mine, 2005 Third Quarter Impoundment Report and Annual Certification of Impoundments <br />Dear Mr. Walker: <br />This letter constitutes the Third Quarter 2005 Impoundment Inspection Report and the Annual <br />Certification of Impoundment for the Edna Mine. The Impoundment Location Map (Attachment A) <br />details the location of each impoundment inspected. Quarterly Pond Inspection Reports (Attachment B) <br />document water level, sediment level, outflow, and required maintenance cited per inspection. Center <br />Ridge Pond, Moffat Pond, West Ridge Pond, and West Ridge Check Dam Structures nine (9) through <br />twenty-one (21) are certified annually (Attachment C) with regard to structure and sediment level <br />capacity in accordance with the Edna Mine Permit (#C-80-001). <br />The inspections were performed on September 21, 2005 by field inspector Troy Summers. The <br />annual certifications have been signed by Colorado Professional Engineer Doyl Fritz (#11589). All <br />structures were functioning as designed at inspection. Although the function of the check dams has been <br />considered adequate, numerous check dams require minor maintenance to restore the structures original <br />design. These repairs have been noted on the appropriate Quarterly Pond Inspection Report. To comply <br />with a request by Byron Walker of the Colorado Division of Minerals and Geology, check dams three (3) <br />through eight (8), which have previously been released from bond, will also require minor maintenance. <br />Minor maintenance has been scheduled during the 2005 maintenance season. Should you have any <br />questions regarding this material, please contact me at your convenience. <br />Sincerely, <br />r d~ ~~~-R1)~---- <br />Beth Heesen, P.G. <br />Project Manager <br />TNS <br />Attachments (A, B & C) <br />cc: Steve Leach <br />Edna Mine Permit <br />K\P&M COeI\Edn Mine\1999-144LV2epoetsVmpoundmems\2005Urd Quarter\CDMG_10p505.doc <br />